swift - 如何在 Swift 中删除 UIButton 的 CALayer 底部边框？

Question

如何在 Swift 中删除 UIButton 的 CALayer 底部边框？底部边框添加到 week1 按钮，但单击按钮 week2 时不会删除。

我还添加了屏幕截图

这是我的代码:

     @IBAction func week1BtnTapped(_ sender: UIButton) {
            week1.isSelected = true
            didTapButton(btnClicked: week1)
            week2.isSelected = true
            didTapButton(btnClicked: week2)
            btnSelectedText = "Week-1"
            serviceCall()
        }

        @IBAction func week2BtnTapped(_ sender: UIButton) {
            week2.isSelected = true
            week1.isSelected = false
            didTapButton(btnClicked: week1)
            btnSelectedText = "Week-2"
            didTapButton(btnClicked: week2)
            serviceCall()
        }

      func didTapButton(btnClicked:UIButton){
          let border = CALayer()
            if btnClicked.isSelected {
            border.borderColor = UIColor.gray.cgColor
            border.frame = CGRect(x: 2, y: btnClicked.frame.size.height - 2.0, width:  btnClicked.frame.size.width - 5, height: btnClicked.frame.size.height)

            border.borderWidth = 3.0
            btnClicked.layer.addSublayer(border)
            btnClicked.layer.masksToBounds = true
            }
           else{
             border.borderColor = UIColor.white.cgColor
            border.borderWidth = 0.0
            border.frame = CGRect(x: 2, y: btnClicked.frame.size.height , width:  btnClicked.frame.size.width - 5, height: btnClicked.frame.size.height)
            btnClicked.layer.masksToBounds = true
            }
        }

Answer 1

我认为week1BtnTapped中有一个拼写错误。 isSelected的button2应该是false ，这样didTapButton中的条件将按照您的意愿工作。